<template>
  <div class="wrapper" ref="wrapper">
    <div class="content">
      <slot></slot>
    </div>
  </div>
</template>

<script>
import BScroll from 'better-scroll'
export default {
  name: 'Scroll',
  props: {
    probeType: {
      type: Number,
      default: 0
    },
    pullUpload: {
      type: Boolean,
      default: false
    }
  },
  data () {
    return {
      scroll: null
    }
  },
  mounted () {
    // 1.创建Bscroll对象
    this.scroll = new BScroll(this.$refs.wrapper, {
      click: true,
      probeType: this.probeType, // 3 侦测滚动位置
      pullUpload: this.pullUpload
    })
    // this.scroll.scrollTo(0, 0)

    // 2.监听滚动位置 @scroll - 监听滚动位置
    if (this.probeType === 2 || this.probeType === 3) {
      this.scroll.on('scroll', (position) => {
        // console.log(position)
        this.$emit('scroll', position)
      })
    }

    // 3.监听上拉事件
    if (this.pullUpload) {
      this.scroll.on('pullingUp', () => {
        // console.log('上拉加载更多')
        this.$emit('pullingUp')
      })
    }
  },
  methods: {
    scrollTo (x, y, time = 300) {
      this.scroll && this.scroll.scrollTo && this.scroll.scrollTo(x, y, time)
    },
    finishPullUp () {
      this.scroll.finishPullUp()
    },
    refresh () {
      console.log('scroll 刷新')
      this.scroll && this.scroll.refresh()
    }
  }
}
</script>

<style scoped>
</style>
